I think we have to raise potsized here at the very least. I don't like calling the donkbet because we do not understand anything of it. If he bets again, he might bluff again and/or valuebet, we don't know!

What he does know (though this is microstakes) is what your range is because it is mostly fragile and relatively weak

As played the Turn sucks so we have to fold but I am sure this won't happen if oyu raise bigger